/*
*    Qizx/open 3.0 beta
*
* This code is the open-source version of Qizx.
* Copyright (C) 2004-2009 Axyana Software -- All rights reserved.
*
* The contents of this file are subject to the Mozilla Public License 
*  Version 1.1 (the "License"); you may not use this file except in 
*  compliance with the License. You may obtain a copy of the License at
*  http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
*  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
*  for the specific language governing rights and limitations under the
*  License.
*
* The Initial Developer of the Original Code is Xavier Franc - Axyana Software.
*
*/
using System;
using DateTimeException = System.Qizx.Api.Util.XQDateTimeException;
using Duration = System.Qizx.Api.Util.XQDuration;
using XQItemType = System.Qizx.XQuery.XQItemType;
using XQType = System.Qizx.XQuery.XQType;
using XQValue = System.Qizx.XQuery.XQValue;
namespace System.Qizx.XQuery.Dt
{
	
	/// <summary> A scalar Duration value.</summary>
	public class SingleDuration:DurationValue
	{
		public override Duration Value
		{
			get
			{
				return _value;
			}
			
		}
		private Duration _value;
		
		private bool started = false;
		
		public SingleDuration(Duration value):this(value, XQType.DURATION)
		{
		}
		
		public static SingleDuration newYM(Duration value_Renamed)
		{
			if (value_Renamed == null || !value_Renamed.YearMonth)
				throw new DateTimeException("invalid yearMonthDuration value");
			return new SingleDuration(value_Renamed, XQType.YEAR_MONTH_DURATION);
		}
		
		public static SingleDuration newDT(Duration value_Renamed)
		{
			if (value_Renamed == null || !value_Renamed.DayTime)
				throw new DateTimeException("invalid dayTimeDuration value");
			return new SingleDuration(value_Renamed, XQType.DAY_TIME_DURATION);
		}
		
		public SingleDuration(Duration value_Renamed, XQItemType subType)
		{
			this._value = value_Renamed;
			itemType = subType;
		}
		
		public override bool Next()
		{
			return started?false:(started = true);
		}
		
		public override XQValue BornAgain()
		{
			return new SingleDuration(_value, itemType);
		}
	}
}